[c-nsp] Difference between ISIS NSR and ISIS NSF Cisco-Style

[Oliver Boehmer (oboehmer)]

Amit,

>
>I was testing NSR ( NSF - CIsco) in IOS-XR in GSR and CRS , However i am
>able to see the LSP-DB's syncing in both the routers.
>
>RP/0/8/CPU0:cr2.BLB#sh isis checkpoint lsp
>Tue Jan 15 05:49:21.676 IST
>
>IS-IS COLT checkpoint LSPs
>Level  LSPID                  Chkpt ID
>  2    crs1.BLB.00-00         80002c38
>  2    cr2.BLB.00-00          80002c18
>  2    dr2.blb-ASR1004.00-00   80002bf8
>  2    vrr2.BLB.00-00         80002bd8
>  1    SAR3-test7.blb.00-00   80002bb8
>  1    crs1.BLB.00-00         80002b98
>  1    cr2.BLB.00-00          80002b78
>  1    pr1.BLB-7206G1.00-00   80002b58
>  1    dr1.blb:inet.00-00     80002b38
>  1    cng1.BLB.00-00         80002b18
>  1    dr1.blb.00-00          80002af8
>  1    sar4.BLB-re1.00-00     80002ad8
>  1    sar5.BLB.00-00         80002ab8

[Š]
>
>
>Just to make sure LSPDB syncing is happening with NSF cisco style .Is
>this something newly added??

These checkpoints don't replace the database sync triggered by the PNSP,
the router actually only stores the LSP header information in those
checkpoints, which it uses during the sync. It's different from a "full"
NSR solution where all LSP/LSA information would be present on the
restarting RP.

	oli